CVE-2026-112377
CVE-2026-112377 · CCC Attestation SIG attested-tls-poc through commit 731ca82 Attestation Relay Attack
This page contains facts from public vulnerability sources. Check the original advisory before updating.
CCC Attestation SIG attested-tls-poc through commit 731ca82 fails to bind early attestation Evidence to the TLS connection, allowing attackers to relay valid Evidence from a genuine attester. Attackers holding an extracted attested TLS private key can forward the relying party's nonce to a genuine attester and replay its Evidence to impersonate the attested workload and intercept data.
CVSS 9.1 · Critical · EPSS 0.2%
- Published
- Updated
Affected products and versions
attested-tls-poc
- Versions
- ≥ 0, ≤ 731ca82ed533fc7a1092be980887ae2e34261da2: Affected (git)
No fix published
Original sources
- https://github.com/CCC-Attestation/attested-tls-poc/pull/58
- https://github.com/CCC-Attestation/attested-tls-poc/tree/5b6c5374b3fe8b671906c8ab32f6134d9c3da26d/relay-attacks-formal
- https://github.com/ionut-arm/mbedtls/blob/f4ac7593826a506fc509c83cad73786acab1d442/library/ssl_tls13_generic.c#L430-L436
- https://datatracker.ietf.org/doc/draft-intra-handshake-fail/
- https://github.com/muhammad-usama-sardar/intra-handshake.fail
- https://github.com/CCC-Attestation/attested-tls-poc
- https://www.vulncheck.com/advisories/ccc-attestation-sig-attested-tls-poc-through-commit-731ca82-attestation-relay-attack
- https://nvd.nist.gov/vuln/detail/CVE-2026-112377